Age Calculator
Enter your birth date — get your exact age in years, months and days, plus a countdown to your next birthday.
Pick the date from the calendar, or type it as YYYY-MM-DD. Results update live as you change it.
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Years
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Months
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Days
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Total days alive
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Total weeks
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Total months
- You were born on a
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- Next birthday
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- Countdown
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Leap-day birthdays are counted on February 28 in non-leap years.
Working…
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Your results will appear here.
Fill in the input above and run the tool to get started.
Honest limits
Age is computed from the calendar date you enter using standard Gregorian calendar rules. Time-zone differences of a few hours around midnight can shift the day count by one.
How to use the Age Calculator
- Enter your birth date — pick it from the calendar or type it as
YYYY-MM-DD. - Click Calculate my age — or just change the date; everything recalculates live.
- Read your exact age in years, months, and days, plus totals, your birth weekday, and the countdown to your next birthday.
Examples
Example
Born 1990-06-15, on 2026-10-05 → 36 years, 3 months, 20 days old, with 13,261 total days alive. (Try your own date above!)
What this tool doesn't do
- This is not a legal document — for passports, licenses, and contracts, your official ID governs.
- Around midnight, time-zone differences of a few hours can shift the day count by one; check again after midnight local time if your birthday is today.
- Leap-day (February 29) birthdays are counted on February 28 in non-leap years — a documented convention, not a legal rule.
- The calculator uses the Gregorian calendar and makes no health or longevity predictions.
Frequently asked questions
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